Maybe. But watching Leonard against Norway, an admittedly a weaker opponent, he looks like a true future star in the NHL. I have my doubts that Reinbacher will be more valuable. Real doubts.
Leonard has looked like a very good player who looks great playing with two linemates of superior skill.
Comparing him to Reinbacher is something of a silly exercise due to playing entirely different positions in different leagues on teams who are experiencing the opposite relation to each other from a team success standpoint.
I have compared Leonard's upside to Zach Hyman and Reinbacher's to Pietrangelo. I take Pietrangelo all day over Hyman and yes, I know these comparison models are very flawed. I do think these two are modelled after specific prototypes and imo the prototype that Reinbacher is closer to is more valuable than the one than Leonard is modelled after.
Dman are notorious for taking longer to reach their ceiling than wingers as D is a much more cereberal position so I would not put much weight into the appearance of Leonard coming out of the blocks quicker.
To be clear, I am not saying that Reinbacher is better than Leonard just that there is not any reason to believe that Leonard is better.
I have no real opinion as of yet due to how early in the process each player's development towards professional hockey currently sits, so while it is fun to pick sides I will wait for some actual evidence.